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Old 08-06-2010, 11:28 AM   #16
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If your motor runs high for a few seconds then drops, that usually means its a little rich on the bottom. Lean it a little at a time and drive it around then check it again. Should run constant idle for 10-20 seconds without a change. Now leaning out the low speed needle will make it idle higher, but when it stays constant for that 10-20 seconds, you know you have the bottom set right, then adjust the idle screw to lower the idle speed. Test again to make sure top speed is still set right because leaning out the bottom end will sometimes make the top too lean, may have to adjust it an hour or so to the rich side.

Hope this helps..

Tim
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